Anticreep anchorage means for tire boots



.Oct 20, 1936. A, STANZEL 2,057,799

ANTICREEP ANCHORAGE MEANS FOR TIRE BQOTS Filed May 5, 1934 Patented Oct. 20, 1936 Ui STATE PATET OFFICE.

ANTICREEP ANCHORAGE MEANS FOR TIRE BOOTS 9 Claims.

This invention relates to improvements in anticreep anchorage means for tire boots of the type which is in the form of small metal body members adapted to be secured to the tire boot so as to be placed between the boot and the tire casing when the boot is in position, to prevent slippage of the boot relative to the casing, the object of my invention being to provide a simple, durable and inexpensive anti-creep device which may be formed from sheet metal by the stamping process, and adapted to be secured to the outer surface of the boot in such a manner that the projecting prongs of the device will enter the fabric of the casing when pressure is applied to the boot upon the inner tube being inflated'.

A further object of my invention is to provide an anti-creep device for tire boots, having improved means for more securely fastening the device to the boot and at the same time increase the clinging effect.

A further object is to provide in an anti-creep device of the type having laterally projecting prongs, an improved means whereby the prongs may more readily enter the fabric and be more rigidly secured thereto with less cutting effect on the cords of the fabric.

My invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawing, in which:

Figure 1 is a perspective View of my improved anti-creep device.

Figure 2 is` an enlarged detail sectional view showing the manner in which the device is applied to a tire boot and casing.

Figure 3 is a perspective view of the tire boot showing the manner in which my improved devices are applied thereto.

Figure 4 is a transverse sectional View of a portion of the tire tread, together with the boot, showing the manner in which the anti-creep devices are applied.

Figure 5 'is an enlarged sectional view showing the manner in which one of the barbed prongs of the anti-creep device enters the tire boot fabric.

Figure 6 is a perspective View of a slightly modified form of my device.

My improved anti-creep device comprises preferably a pair of disc shaped body members l0, one of which is superimposed upon the other, the discs being connected by means of a rivet ll, the adjoining faces of the discs being slightly convexed so as to permit one disk to rotate freely upon the other. The edge of each disc is provided with a series of outwardly and laterally projecting prongs l2, each of the prongs having Y its outer end pointed and provided with a barbed 5 portion i3, as clearly illustrated in Figure 1.

The anti-creep device is applied to the tire boot I4, which is of ordinary construction, by means of the rivet il, in the manner illustrated in Figure 2, the devices being riveted to the outer l surface of the tire boot near the inner edge of the bevelled portion of the boot. Any desired number of these anti-creep devices may be applied, although I preferably use either four or eight. As the anti-creep device is applied to the l boot the prongs l2 of the inner disk I0 are forced into the rubberized fabric until the outer surface of the disk engages the outer surface of the tire boot. The pointed end of the prongs will have atendency to work themselves in between the cords l5, causing the adjoining cords to be sprung apart, some of the cords entering above the barb i3, as illustrated in Figure 5. The tendency of the cords to assume their original position will cause the cords to enter the space above the member I 3.

In applying the boot to the inner surface of the casing |5a the boot is simply placed in position over the ruptured portion of the casing in the usual manner, after which the inner tube is applied and inflated. The pressure created by the inner tube will force the prongs of the outer disc I0 into the rubberized fabric of the casing 15a.. By pivotally connecting the inner disc l0 to the outer disc it will be seen that the disc is perfectly free to rotate to permit the pointed end of the prongs to enter between the cords of the casing rather than to sever them, the barbed portion I3 of the said prongs tending to lock the prongs in position and to thereby more rigidly secure the boot to the casing.

Pivoting the inner disc to the outer disc also greatly decreases the tendency of the barbs to mutilate the casing, due to the continuous stretching and movement of the casing relative to the boot as the reinforced portion of the casing is moved into and out of engagement with the ground surface.

In Figure 6 I have illustrated a slightly modied form in which a single disc I6 is pivotally con- 50 nected to the outer surface of the boot by means of a suitable rivet Il, the disc i6 being similar to the disc ID and provided with similar barbed prongs I8, the latter construction being used with cheaper and lighter casings.

Another advantage in my construction lies in the fact that the barbed portion of the prongs, after they have been forced into the fabric, will securely hold the boot in place in the casing even after the casing has become deated, thus preventing the boot from loosening and moving in the casing, and preventing the prongs from mutilating the inner surface of the casing in case the tire is operated a short distance while being deflated, which condition usually occurs each time a puncture takes place.

It will, therefore, be seen that I have provided a simple, durable and inexpensive anti-creep device for tire boots which may be easily and quickly applied to the boot and, when so applied,

Y is rmly supported against being torn loose, and

also provides eiiicient means for securing the boot to the casing to prevent creeping wherein the tendency of mutilation of the boot is materially decreased, thus providing means whereby the boot may be easily and quickly applied'without the use of cement and other adhesive compositions.

I claim as my invention:

l. An anti-creep anchorage means for tire boots comprising a disc having barked prongs projecting laterally from its edge, a second disc similar to the first disc, means pivotally connecting said discs together, the prongs of one disc being adapted to be imbedded in said boot, With the prongs of the opposite disc imbedded in the casing in which the boot is mounted.

2. An anti-creep anchorage means for tire boots comprising a pair of discs, means pivotally connecting said discs together, the outer surface of each disc being provided with laterally projecting prongs for the purpose stated.

3. An anti-creep anchorage means for tire boots comprising a pair of discs, means pivotally connecting said discs together, the adjoining surfaces of said discs being slightly convexed,` the outer surface of each disc being provided with laterally projecting prongs for the purpose stated.

4. An anti-creep anchorage means for tire boots comprising a pair of discs, means pivotally connecting said discs together, the adjoining surfaces of said discs being slightly convexed the outer surface of each disc being provided with laterally projecting prongs, each of the prongs being barbed for the purpose stated.

5. The combination of a tire casing, a boot within said casing, a series of anti-creep devices secured to the outer surface of said boot and to the inner surface of said tire casing, said anticreep devices comprising a pair of disc shaped, body members, means pivotally connecting said body members together, each of said discs having a series of laterally projecting barbed prongs, the prongs of one disc being imbedded in the boot and the prongs of the other disc being imbedded in the tire casing.

6. An anti-creep anchorage means for tire boots comprising a disc having-barbed prongs projectingV laterally from its edge; a second disc similar to the first disc; and means pivotally connecting said discs together, the prongs of one disc being adapted to be imbedded in said boot, with the prongs of the opposite disc imbedded in the casing in which the boot is mounted.

'7. An anti-creep anchorage means for tire boots comprising a disc having barbed prongs projecting laterally from its edge, means for pivotally connecting the disc to the outer surface of a tire boot, said prongs being adapted to be imbedded in the tire casing when a boot is applied therein, the disk being permitted to rotate slightly relative to the boot to permit the barbs of the prongs to more freely enter between the cords of the casing to which the boot is applied.

8. The combination of a tire boot, a disc having barbed prongs projecting laterally from its edge, means pivotally securing said disc to said boot, the barbs of said prongs projecting in a common circumferential direction whereby the disc may be slightly rotated about its pivot as pressure is applied to said boot to permit the barbs of said prongs to more readily enter between the cords of the casing to which the boot is applied, for the purpose stated.

9. An anti-creep anchorage means for tire boots comprising a disc having its edge provided with laterally projecting prongs, each having a barb, all of said barbs projecting in a common circumferential direction, and means for pivotally connecting said disc to a tire boot.

GEORGE A. STANZEL. 

